Process of treating hides or skins



Patented Feb. 14, 1928.

HARRY nonen, or nan-vans, massncnusn'r'rs.

PROCESS OF TREATING RIDES OB SKINS.

No Drawing.

This invention relates to a process of preparing puered skins or hides and hasfor-its object for not only refining the grain of, but

also for making the hide or skin uniform to such an extent whereby after the tanning thereof, the quality of the leather produced will be greatly enhanced and under such conditions increasing its Value.

A further object of the invention resides in the preparing of puered skins and hides to preserve them for shipment.

A further object of the invention resides in the preparing of puered skins in a wet state for shipment.

Further objects of the invention are to rovidc, in a manner as hereinafter set fort 1, a process of preparing or treating puered skins or hides for the purpose referred to which is simple, expeditious and efficient in its use, conveniently carried out, and comparatively inexpensive to employ.

An embodiment of a process or preparing puered skins or hides for the purpose referred to and in accordance with this invention will be hereinafter set forth, but it is to be understood that changes, variations and modifications thereof can be resorted to which fall within the scope of the claims hereunto appended.

In carrying out the process of treating or preparing puered skins or hides, in accordance with this invention, the hidesor skins, under a state of agitation. are subjected to a bath of alum, common salt and water for a few minutes, after which there is added to the bath nitre KNO, and formaldehyde. The hides or skins are again agitated until the grain and flesh substance thereof are cured and preserved. Nitric acid or distilled sulphuric acid could be used in place of nitre, but preferably the nitre is employed, as the result is better. a

The alum and salt'both preserve the skins or hides. The formaldehyde binds or fastens the substance of the hide or skin together, and the nitre acts as a filler and fills in the hide or skin substance.

The amount of alum employed is approXimately 1 to 10% of the weight of the skins or hides to be treated, the salt approximately 1 to 10%, the nitre one-half to 5% and the formaldehyde one-quarter to 5%. The water of a desired amount. The potassium for treating Application filed May 14, 1927. Serial in. 191,556.

nitrate KNO base produces a more valuable product than has heretofore been obtained.

Ithas been found that after the skins or hides are treated in the manner as stated, the skin or hide substance is of a better quality and more uniform than obtained by known processes, and after the hide or skin is tanned by any tanning methods, such as chrome, alum, gambia, sumac or bark, the quality of the leather produced is materially increased resulting in a greater value'therefor.

The subjecting of the hides or skins to the preservatives, binder and filler as heretofore stated, will preservethem for shipment, as well as permitting shipment thereof in awet sta e. i

What I claim is 1. A process of treating puered skins or hides consistin in subjecting the article to be treated, whi e under a state of agitation, to a bath of alum, salt and water, then adding to the bath formaldehyde and nitre, then agitating the article being treated while subeeted to the action ofthe alum, salt, formaldehyde and nitre.

2. A process" of treating puered skins or hides consisting of subjecting the article ,to be treated, while under a state of agitation, to a bath of alum, salt and water, the roportion of the alum being approximately 1 to 10% of the weight of the article and the proportion of the salt being thesame, then adding to the bath formaldehyde and nitre with the proportion of the formaldehyde being one-quarter to 5% of the weight of the article and the proportion of the nitre being one-half of 5% with respect to the weight of the article, then agitating the article while subjected to the action of the alum, salt,

nitre and formaldehyde for an appropriate period.

3. In a process of treatin or preparing puered hides or skins the su jecting of the latter to a bath consisting of water, alum, salt, formaldehyde and nitre.

4. In a process of treating or preparing puered hides or skins the subjecting of the latter to a bath consisting of water, alum, salt, formaldehyde and nitre, the proportion of the alum and salt being 1 to 10% with respect tothe weight of the articleor articles being treated, the proportion of the formaldeyhde being one-quarter to 5% with recomprising Water, alum salt, nitre and formaldehyde substantially in the proportions as set forth.

In testimony whereof, I aflix my signature hereto.

HARRY DODGE. 

